Belting fabric and process



l, 1950 J. B. SIDEBOTHAM BELTING FABRIC AND PROCESS Nov.

OOO O 000 Inl/enfer' a/ff 2 Sheets-Sheet l Filed Jan. 25, 1948 Nov. 21. 1950 J. B. SIDEBOTHAM BELTING FABRIC AND PROCESS 2 Sheets-Sheet 2 Filed Jan. 23, 1948 Patented Nov. 2l, 1950 UNITED STATES PATENT OFFICEv BELTING FABRIC AND PROCESS John B. Sidebotham, Philadelphia, Pa.

Application January 23, 1948, Serial No. 3,950

15 Claims.

The present invention relates to belting fabrics of the type which are woven to the width of the finished belt and comprise a plurality of successively Woven belts end-to-end, each having lap end sections.

A purpose of the invention is to reduce the stretch of belts of the character indicated without materially reducing the flexibility.

A further purpose is to carry a series of stretch limiting stufer warp ends lengthwise and straight between the plies of the body of a belt and to interweave them adjacent to the ends of the belt, so that the straightness will aid in limiting the stretch and the interweaving will tie the warp ends to the belt.

A further purpose is to use stretch limiting stuffer warp ends lengthwise between the plies throughout the bulk of the body of `a belt and to `interweave such stulfer warps with the fabric adjoining lap end sections, preferably in the lap end sections themselves, and permissibly in the body adjoining the lap end sections or in the body adjoining the lap end sections and in the lap end sections also.

A further purpose is to carry along the stuifer warps lengthwise throughout the bulk of the body of the belt in a spaced straight parallel relation between the plies.

Further purposes appear in the specication and in the claims.

few only of the numerous embodiments in which this invention may appear, choosing the forms shown from the standpoints of convenience in illustration, satisfactory operation and clear demonstration of the principles involved.

f Figure 1 is a fragmentary top plan View rof my improved belting fabric.

Figure 2 is a side elevation of Figure 1.

Figure 3 is a perspective of an individual belt with the lap end sections brought together preparatory to joining, before the loose warp ends are cut away for splicing the lap end sections.

Figure 4 is a diagrammatic longitudinal view of the preferred weave at the lap end section.

Figures 5, 6 and '1 are views similar to Figure 4 showing variations.

Figure 8 is a diagrammatic sectional plan view showing the alignment and spacing of the stuffer warps, the section being on the line 8 8 of Figure 4. i Y

In the drawings like numerals refer to like parts.

In my Patent No. 1,999,578 a ,belting fabric of the general type under discussion is illustrated,

In the drawings I have chosen to illustrate al and this patent is incorporated herein by reference and made a part hereof for the purpose of simplifying the description.

The belting fabric of the present invention is primarily useful for power transmission on textile machinery and other equipment, especially under moderate and high speeds, for example, speeds of 10,000 R. P. M. are easily reached in driving a whorl or bobbin pulley. In this service, maintenance of belt iiexibility is highly important in limting wear, and I find that any marked decrease in flexibility greatly shortens the service life. I

On the other hand, difliculty has been encountered with belts of the character of my prior patent through excessive stretch, and it has not been possible to overcome this difficulty by limiting the stretch without consequent serious and disastrous reduction in fiexibilty.

In accordance with the present invention I have found it possible to reduce the stretch of the belt while only very slightly affecting the flexibility. In order to accomplish this purpose, I employ stuffer warps which are preferablyv rela-v tively inextensible compared with the face warps and binder warps of the fabric and which are not interwoven but merely carried straight between the plies of the fabric lengthwise throughout the major portion of the body of the belt, and are interwoven adjacent the ends, either in the lap end sections, or the body immediately adjoinin the lap end sections, or both. y

The straightness of the stuffer warps in the body makes them more effective to limit stretch than warps which follow a wavy or serpentine path due to weaving and the relatively inextensible character of the stuffer warps in the preferred form makes them more effective in limiting stretch. The tie in to the belt by weaving at the ends is important, snce, if the stuffer ends are not tied, the belt will stretch, leaving a portion of the belt void of stuffer ends.

Any relatively inextensible or controllable stuler warp yarn may be used. The stuffer warp should consist of a material which is of higher strength and of relatively less extensibility than the fabric which would have resulted by weaving only the face, back and binder warps. The relatively inextensible Warp yarn may be made by applying an inextensible coating on natural fibre. A suitable stuffer warp yarn may be made from cotton Acoated with cellulose acetate butyrate (known .as PleXon). The coating on the bre may instead be urea formaldehyde plastic, or phenol formaldehyde plastic. Similar` stuffcr 3 Warp yarn may be made of coated linen, ramie, glass, jute, cotton, etc. The stuffer warp may also consist solely of glass, linen, ramie, jute, cotton, etc.

As seen in Figures 1 to 4 inclusive and 8, the belting fabric of the invention extends indefinitely, consisting of many belts woven successively end-to-end, and cut apart at the lap ends to make the individual belts. The fabric is woven the predetermined proper width for each belt, and has selvedge edges I and II, and extends in length as indicated by the arrow I2. individual belt which makes up part of the length of the fabric comprises a body I3,- which forms most of the length of the belt, and lap end sections I4 and I5 which are respectively made thinner than the body and are preferably alternately thinned on opposite sides so that they willconveniently lap and can be stitched together or otherwise joined. As best seen in Figure 4 the fabric consists of two or more plies I6 and I1 which, throughout the body of the belt, except in the lap end sections, are united by binder warps'IB. Each ply comprises face or ply warps I9 or I9 and lling 21'! or 23 which is the same thread.A In each ply the face orl ply warps and the lling are suitably interwoven as shown and'also interwovenwith the binder warps.`

Inaccordance with the prior practice, at the lap end sections the binder warp ends I8 are woven in at 2 I 4to that ply which is to formeach lapend` section, transferring'at 22 from one ply to another to form the opposite lap end section. Thuseach lap end section isfundamentally made up by'one set of face or ply'warps and theV corresponding lling with the binder warps.

In accordance with the present inventionstuierwarp ends 23'are introduced, arranged parallel and side by side in spaced relation as exemplified in Figure 8 so as to be quite flexible and normally carried through the bulk of the belt between the plies as shown at 24' without interweaving. This assures flexibility in the body of the'belt.

The material andl construction of the-stuifer warp are chosen so as to make it relatively less extensible than" and relatively equal in strength to' thefaceor ply warps and the binder warp. The-face and binder warps areordinarily of cotton in its natural form which is well suited for the' purposeA except for its extensibility. The stuffer Warps as stated may be'made, for example, of a relatively less extensible plastic, as for' example, natural 'fibre coated with plastic, or may 'beformed of'any suitable material, natural o r' synthetic, which is less extensible than the face;- backand binder'fabric. Adjacent the lap endsections thestuiferwarps are woven into the fabric. This may be accomplished by weaving them into each lap end section as shown at 25 in Figure 4; In thisfcase they are interwoven first with the face warp ends or ply andwith the binder warp ends and filling of thatv ply, and then crossedat 26 with the binderwarp ends to theoppositeply, and'th'ere interwoven with the face and binder warp ends and lling of'that ply:Y

Interweaving of the stuffer warp ends may also be accomplished in the portion of the body of lthe belt immediately adjacent the lap end sections without interweaving in the lap end sectonsthemselves. This is shown at 21 in Figure Where the stufler2 warp ends' follow theA course of the binderwarp ends', interweaving with the plurality-'ofi plies in' a portion off tric-Moody'4 of Each i each belt adjacent each lap end section and then are carried at 28 through the space outside the lap end sections as rejected warp ends, along with the rejected warp ends 29 of the opposite ply which are not used in making a given lap end section.

If desired, instead of weaving into all plies of the fabric as shown in Figure 5, the stuffer warp ends may be interwoven only with one ply at the' portion of the fabric adjacentfthe lap end sections, as shown at 30 in Figure 6, where the stuffer warp ends interweave with the ply which is to form the next lap end section back of the lap end section and are then carried as rejected warp ends 3l without interweaving along the lap end sections.

This last feature is not particularly desirable, and it isordinarily preferable to interweave the stuffer Warp ends with the lap end sections as shown at 25 in Figure- 4, and also back of the lap end sections at'll, as shown in Figure-'7.

If desired, instead of weaving into all plies of' the fabric as in Figure 5, the stuier warp ends may be interwoven only with one ply at the portion of the fabric adjacent the lap end sections and in the lap end sections as shown at 30 in Figure '7, where the stuffer warp ends interweave with the ply which isto form the next lap end section back of the lap end section andare then interwoven with the face and binder warp ends and lling of that ply, then crossed at 26 on Figure '7 with the binder ends I8 on Figure 7 totheopposite ply, and there interwoven with the face and binderwarp ends and lling of that ply, as shown in 3l)v in Figure 7.

It will be evident that the stuffer warp ends are aligned parallel and flat with individual warp ends laterally in contact in the preferred embodiment, but without substantial lateral stress, so that the presence of the stuffer warp ends will have minimum effect on the flexibility and'maximum effect on the strength and inextensibility. If preferred, yindividual stuffer warp ends may be spaced as desired, omitting stuffer warp ends at any desired positions across the width offthe fabric, but in order to maintain adequate absence of ridges in thefabric, it has been found to be best to employ a stuffer warp end corresponding to each binder warpend or pair of binder warp ends.

I find that the interweaving immediately adjacentV thelap end sections whether immediately back of the lap'end sections, in the lap end sections orv in both places', has'comparatively little effect on the flexibility, but at the same time, ties the stuierwarps into the fabric at the ends, and has`a marked' tendency to limit thev stretch.

Thus it will be evident that inV accordance with the present invention' a` belt will retain the high wearing qualities ofthe belts of my' prior patent even under severeA serviceA at very high speeds, without at the same time requiring undue main*- tenance to take up for stretch, and without serious stretching; as has r4been found in the prior art.

In tests at'veryl high speeds it has `been found that the belt' ofthe invention drives at more uniform speed than prior art belts.`

Wheneverreference is made herein to the fact that'the belting fabric has end portions including lap end sections, and'that the interweaving of the stuffers is in the end portions, it is intended to indicate that theinterweaving will be accomplished in the lap end sections. in one or' the otherfof the plies"(c'ar'bothplies)v backof'the lap end' sectionspr "in' the' lap' end` sections and-- back of the lap end sections, in any combination and relationship which may be desired to achieve most adequate tying in of the stuffer warp endswith the fabric.

In the claims stuffer warp ends are said to be -in floating relation when they are carried along without interweaving.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the fabric and process shown, and I, therefore, claim all such insofar as they fall within the reasonable spirit and scope of my claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A belting fabric woven to the'l width of the finish belting, having a plurality of plies each provided with face warp ends and filling interwoven in each ply, binder warp ends binding the plies through to the body of the belting portion, the belting fabric having, at the ends of the body of each belting portion, end portions including lap end sections woven with less than all of the face warp ends woven into the fabric and having stuffer warp ends carried straight lengthwise between the plies of the fabric throughout the major portion of the body of each belting portion and only interwoven with the fabric in the end portions.

2. A belting fabric woven to the width of the finished belting. having a, plurality of plies each provided with face warp ends and filling interwoven in each ply, binder warp ends binding the plies through to the body of the belting portion, the belting fabric having, at the ends of the body of each belting portion, end portions including lap end sections woven with less than all of the face warp ends woven into the fabric and having stuffer warp ends carried straight lengthwise between the plies of the fabric throughout the major portion of the body of each belting portion, interwoven with the fabric in the end portions and free from interweaving in the lap end sections.

3. A belting fabric woven to the width of the finished belting, having a plurality of plies each provided with face warp ends and filling interwoven in each ply, binder warp ends binding the plies through to the body of the belting portion, the belting fabric having, at the ends of the body of each belting portion, lap end sections woven with less than all of the face warp ends woven into the fabric and having stuffer warp ends carried straight lengthwise between the plies of the fabric throughout the major portion of the body of each belting portion and interwoven with the fabric in the lap end sections.

4. A belting fabric woven to the width of the finished belting, having a plurality of plies each provided with face warp ends and filling interwoven in each ply, binder warp ends binding the plies through to the body of the belting portion, the belting fabric having, at the ends of the body of each belting portion, lap end sections woven with less than all of the face warp ends woven into the fabric and having stuier warp ends carried straight lengthwise between the plies of the fabric throughout the major portion of the body of each belting portion and interwoven with the fabric in the lap end sections and in the portion of the belting portion nearby.

5. A belting fabric woven to the width of the finished belting, comprising a plurality of belting portions successively woven end-to-end, each having a body portion and end portions including lap end sections, the body portion comprising a plurality of plies having face warp ends and filling and the lap end sections including less than allof the plies, and having relatively inextensible and controllable stuffer warp ends between the plies throughout the major portion of the body of each belting portion and only interwoven with the fabric in the end portion.

6. A belting fabric woven to the width of the finished belting, comprising a plurality of belting portions successively woven end-to-end, each having' a body portion and end sections including lap end sections, the body portion comprising a plurality of plies having face warp ends and filling and the lap end sections including less than all of the plies, and having relatively inextensible and controllable stuifer warp ends between the plies throughout the major portion of the body of each belting portion and interwoven with the fabric in the end portions and free from interweaving in the lap end sections.

'7. A belting fabric woven to the width of the finished belting, comprising a plurality of belting portions successively woven end-to-end, each having a body portion and lap end sections, the body portion comprising a plurality of .plies havlng face warp ends and filling and the lap end sections including less than all of the Iplies, and having relatively inextensible and controllable stuffer warp ends between the plies throughout the major portion of the body of each belting portion and interwoven .with the fabric in the lap end sections.

8. A belting fabric woven to the width of the finished belting, comprising a plurality of belt-y ing portions successively woven end-to-end, each having a body portion and the lap end sections, the body portion comprising a plurality of plies having face warp ends and filling and the lap end sections including less than all of the plies, and having relatively inextensible and controllable stuffer warp ends between the plies throughout the major portion of the body of each belting portion and interwoven with the fabric in the lap end sections and in the portions of the belting portion on either end of the lap end sections.

9. A belting fabric woven to the width of the finished belting, comprising a plurality of belting portions successively woven end-to-end, each belting portion having a plurality of plies each provided with face warp ends and filling interwoven in each ply, binder warp ends binding the plies through the body of the belting portion, the belting fabric having, at the ends of the body of each belting portion, end portions including lap end sections woven with less than all of the face warp ends woven into the fabric, and having stuffer warp ends carried straight lengthwise between the plies of fabric throughout the most of the body of each belting portion between the end portions and only interwoven with the fabric in the end portions.

10. A belting fabric woven to the width of the finished belting, comprising a plurality of belting portions successively woven end-to-end, each belting portion having a plurality of plies each provided with face warp ends and filling interwoven in each ply, binder warp ends binding the plies through the body of the belting portion, the belting fabric having, at the ends of the body of each belting portion, lap end sections woven with less than all of the face warp ends woven into the fabric, and having stuffer warp ends carried 7*, straightl lengtl'iwiseN betweenthe plies ofi the fabric' throughout the bodyof eachbeltingportion'between the portions adiacentthe lap end sections-and interwoven with the fabric' in the lapiend sections.

11.4 VAbelting'fabric woven to the y'width'of the iinish'ed'beltin'g, comprising afplurality` of belting portions successively Woven end-to-end, each beltingzportionhaving a1 plurality of plies' each provided with face warp'ends and'llinginter woven in eachzply; binder warp' ends binding the plies through'the body'of the belting portion, the belting fabric having, at the ends of the body of each-belting portion, end portions including lap end sections wovenwith less than all of the face warpends 'woven into the fabric, and having re1- atively'inextensib'lel and v controllable stufier warp ends carried straight lengthwise between the plies ofA theabric throughout most of the body of each belting portion betweenthe end portions` and only interwoven'l with the fabric' in'the'end-'portions'.

12.1. A- belting fabric 'woven kto the 'width of A the nished belting, comprisinga plurality 'of f belting portions-V successively woven end`toend, each beltingp'ortion' having 1 a' plurality of plies ea'ch provided with facer warp ends Zand*` iillinginter; wovenin each ply, binder warp'ends binding the plies throughthebody ofthe belting portion, lthe beltinglfabric having; attthe ends OftheSbOdYof each belting-portion, .lapwendsections woven with 1ess'than 1. all A of' the face warp` ends 1 woven into the' fabric, andlhavingf relativelyinextensible and controllableV stuier warp ends carried straight lengthwisev between the! plies of the fabric throughout the body of each belting portion and interwovenwith the fabric in the lap end sections.

13. The process of Weaving a belting fabric, wli'iclcomprisesl interweaving a plurality of plies from warp ends' and-'filling carried along parallel toone another, discontinuing the weaving of part of thev totalwarp ends at points corresponding to ends of a-predeterminedlength of an individual belting portion to make lap end sections of a lesser thickness than the body' of the belting portion, binding together the plies by binder Warp 8. ends, carryingl stuffer warp endsfof relatively limited stretch throughthe space between the plies, and, only adjacent the lap endfsections, interweaving the stuiier warp ends with the fabric.

14. The processory weaving a belting fabric, which comprises interweavinga pluralityof plies from .warp ends andlling carried along parallel to one another, discontinuing the weaving of part of the total Warp ends at points corresponding to ends of a predetermined length-of an individual belting portionto-make lap yend sections of a lesser thickness than the body of the belting portion, binding together the plies by binder warp ends, carrying stufer warpl ends of relatively limited stretch through the space between'the plies-andr in the lap end sections, interweaving the stuier warp ends with the fabric. v

15. The process of weaving a belting fabric, which comprises interweavng a plurality of plies from warp ends Iand filling carried along parallel to one another, employing the same filling pick in the plurality of plies, discontinuing the Weaving of one of the plies at each point corresponding to an end portion including a lap end section at the end of an individual belting portion, thereby producing lap end sections of reduced thickness as compared with the total thickness of the plies, binding together the plies by binder warp ends, carrying stuffer warp ends in floating relation along one or more plies to a point adjacent each lap end section and there interweaving the stuffer warp ends with one of thepliesi JOHN B. SIDEBOTHAM.

REFERENCES l CITED The following references are of record in the file of this patentz' UNITED STATES PATENTS Number Name Date 1,538,836 McCarrel May 19, 1925 FOREIGN PATENTS Number Country Date 5,020 Great Britain Mar. 9, 1895 

